Rail drill and chuck therefor



May 22, 1945. H H, TALBOYS ETAL 2,376,524

, RAIL DRILL AND CHUCK THEREFOR l Filed Feb. 1o. 1941l 9 sheets-sheet 1 wai/l May 22, 1945.

H. H. TALBoYs ETAL RAIL DRILL AND CHUCK THEREFOR Filed Feb. l0, 1941 9 Sheets-Sheet 2 1 Lvo: N

May 22, 1945. H. H. TALBoYs 'ET AL 2,376,524

RAIL DRILL AND CHUCK THEREFOR- Filed Feb. 1o, 1941 s sheets-sheet s w a EL@ ,Q @x

May 22, 1945. H. H. TALBoYs ETAL 2,376,524

RAIL DRILL AND CHUCK T'IEREFOR Filed Feb. 1o, 1941 9 sheets-sheet 4 May 22, 1945.v

H. H. TALBoYs ET A1. 2,376,524

vRAIL DRILL: AND CHUCK THEREFOR Filed Feb. 10, 1941 .9 Sheets-Sheet 5 May 22, 1945. H H, TALBOYS ET AL 2,376,524

RAIL DRILL AND CHUCK THEREFOR Filed Feb. 1o, 1941 Asa sheets-sheet e 1 WZL/2 2v 2.9645??- y May -22, 1945. H. H. TALBoYs ETA.

RAIL DRILL AND CHUCK THEREFOR Filed Feb. 10, 1941 9 Sheets-Sheet '7 May z2. 1945.

H. H. TALBoYsET Al. 2,376,524

RAIL DRILL AND CHUCK THEREFOR Filed Feb. l0, 1941 9 Sheets-Sheet 8 May 22, 1945 H. H. TALBoYs ET'AL 2,376,524

RAIL DRILL AND CHUCK THEREFOR `Filed Feb. 1o, 1941 9 sheets-sheet 9 I Patented May 22, 1945 RAL DRILL AND CHUCK THEREFOR Henry H. Talboys and-Henner E. Erickson, Milwaukee, Wis., assigner-s to Nordberg Manufac turing C'o., Milwaukee, Wis., a corporation ofV Wisconsin application February 1c, i941, serial No. 378.260

(c1. p -s) i 23 Claims.

Our invention relates to an improvement in `rail drills and improved chucks therefor.

One purpose is the provision of an improved rail drill which may be employed, for example, in drilling holes in the rails of railway tracks.

Another purpose is the provision oi improved feeding means ior such a drill.

Another` purpose is the provision oi improved supporting means for such a drill.

Another purpose is the provision of improved means .for lifting the drill to raised, position for conveyance along the track. u

Another purpose is theprovision of improved dllVe means.

`Another purpose is the provision of improved means for supporting the drill during its change from lowered drilling position to raised position for travel along the track.

Another purpose is the provision of improved means for maintaining the frictional drive of a rail drill or thelikein effective and proper driving contact.

Another purpose is the provision of improved' guiding means for a rail drill dog or stop.

Another purpose is the provision of an improved chuck and bit `for rail drills and the like.

Another purpose is the provision of a rail drill which may be driven by other rail operating Inachinery, for example track wrenches, or the like. thus avoiding the necessity of having any 'separate power plant for the rail drill itself.

Other purposes willappear from time to time in the course of the specification and claims.

We illustrate our invention more or less diagrammatically in the accompanying drawings wherein:

Fig. 1 is a perspective illustrating the drill in rail drilling position;

Fig. 2 is a sideelevation, with parts broken away and parts in section, illustrating the drill in track operating position, and in dotted line in raised position;

Fig. 3 is a section on an enlarged scale on the line 3 3 of Fig. l;

Fig. e is a section on the line i-d of Fig. 2;

Fig. 5 is a section on an enlarged scale on the line 5-5 of Fig. 2;

Fig. 6 is a section on the line --G of Fig. 5;

Fig. 'l is a section on the line` I-T of Fig. 5;

Fig. 8 is a section on the line 8-3 of Fig. 3;

Fig. 9 is a section on an enlarged scale on the line 5-9 of Fig. 3;

Fig. 10 is a section on a still larger scale on the line ICI-Iii of Fig. 3;

Fig. 11 is a detail;

Fig. 12 is a perspective view illustrating the forwardA end of the device in raised position;

Fig, 13 is Va side elevation similar to Fig. 2, illustrating a modied form;

Fig. 14 is a section through a variant form of the device;

Fig., l5 is an end elevation ofthe structure shown in Fig, lgen a reduced scale;

Fig. 16 is a perspective view illustrating the operation of the device shown in Figs. 14 and 15;

Fig, l'iis an enlarged section taken on the line llf-Ilfcf Fig. 15; and

Fig. i3 is an end View adaptor.

`Like parts are indicated by like symbols throughout the'specification and drawings.

p Referring to the drawings, the track ties are illustrated as at I, carrying thereon any suitable rails 2. 3 indicatesa sh plate having holes `Il. The rail drill includes a frame structure including parallel side plates 5, 6, which may be connected, for example, by tubes 'I at each end and by channel members 8, 8, which also serve as guides for the dog or stop mechanism later described These channels may also be connected by the inverted angle member 9, which may be Welded to the upper flanges of the channels E.

Extending betWeenthe tubes 1 are a pair of spaced parallel bars iti, IIy parallel with` the side frame vmembers 5, 6, They may, for example, be `Welded to the tubes l. Extending between the bar i i and the side frame member 6 are additional transverse supports or angles I2. Mounted upon the vkangles I2 are the longitudinally eX- tending motor supporting bars i3, I4, the bar la resting alsovin part upon the support II. E X- tending across the tops of the bar I!) and the side frame member 5 are two supporting bars or plates I5, I6. The members I5, It constitute a platform iixed in relation to the frame as a Whole, upon which is mounted atransmission base plate Ill, which' maybe secured as by bolts I8. I9 indicate Washers Welded upon the plates I5, I5, upon Whichmthe platform Il actually rests. 20 are'spacingshims or Washers, which may be used laterto raise the platform Il in relation 'to the menrbers'l, I6 When it is desired to raise the platformin relation to the frame, in order to take up stretch in the below described sprocket device'. 2| are any suitable nuts which serve to hold the platform II in place and to confine the adjusting shirns or Washers 25.

l Also Welded to the side frame member 5 is the bearing, assembly, including the flat` portion 22,

loi a rail `drill driving carrying at the bottom a horizontal transversely extending cylindrical sleeve 23 for carrying the chuck structure below described. It also carries a bearing sleeve 24, the purpose of which will later appear. outwardly extending from the flat portion 22 are side webs or walls 26, which are jined at the lower ends to. the sleeve 23. Outwardly extending at the opposite sides thereof arethe angles 21, to which is secured a housing 28 for housing the below described chain drive.

It will be understood that the frame is roughly centered over one 'rail and may be supported in position on the track as by the outwardly extending supporting rod 29, which may at its outer end be provided with any suitable track engaging roller 30, suitably insulated or of insulating material. The rod 29 may be telescoped into one of the tubes 1, and may be held in adjusted position as by any suitable pin 3|. that the rod 29 is reversible, and as shown in dotted line in Fig. 1 may be inserted into the opposite end of the second tube 1. When it is-in the full line position of'Fig. 1, the drill is effectiveag-ainst the outer face of one of therails. When it is inserted in the dotted line position, the frame may be centered over the opposite rail, and in that event it is effective for operation against the inner face of the rail. In other words, the device may be employed to drill against the outer or inner face of either one of the rails of the track. The bars 1 are slightly inclined, as will be clear in Fig. 1, which maintains the frame in the proper position for a direct horizontal drilling axis when the device is in the position in which it is shown in Fig. 1.

32 indicates any suitable'stop for limiting the penetration of the bar 29 into the tube 1 to properly align the pin 3| with the mating aperture in the rod 29, such laperture being shown at 33 in Fig. 11. One or more additional apertures 34 maybe provided, if desired, in order to permit an extension of the eiective length of the rod 29.

Extendingbetween the side frame member 6 and the intermediate support at each end of the device are pivot rods 35, uponV which are rotatable sleeves 36, carryingl radial arms 31, the ends of which carry track engaging tubes 38. Each suchsleeve has an upwardly extending arm 39, carrying'a pivoted nut 40, in mesh with an actuating rod 4|, havingV oppositely screw threaded portions 42 and 43. It will be understood that rotation of the rod 4| in one direction moves the arms'39apart, and rotation in the opposite direction moves them together. The result is to raise or lower the frame in response to the contact of the members 38 against the rail top.

In order to rotate the rod 4| we provide any suitable means, for example a ratchet lever 44 on one end of the shaft 4|. The shaft is centered and held against endwise movement, for example by a slotted ear 46, which may be Welded to the angle member 9, las shown for example in Fig. 8, the shaft being provided with abutments 41 at each side of the member 46. It will be understood that the frame may be thus raised or lowered to position the drill centerat the desired level in relation to the track upon which, the device is being used.

We provide additional means for raising or lowering the frame, which may be employed, for example, when the drill is being used at the end of the rail, and whenone of the members" 38 may be out-1 ofv contact withtherailendi We illus.'-

It will be understood,

trate, for example, vertically axised screws 49, with track engaging heads 5D, which are screw threaded into blocks 5|, which may be secured between the membersv |9,. |I. These screw threaded blocks are split, and in order to lock them we provide lock bolts 52 extending through the members lo, Il. The heads 50 may be made` square or' hex, in order to take a wrench for the 'adjustment of the screws 49.

55 indicates any suitable motor, the details of which form no part of the present invention. The motor is provided with a motor shaft 56, carrying a roller 51, secured by any suitable means to the shaft. The roller may, for example, belibre. The roller abuts against the inner face of the drum flange 56, which forms part of the drum 56, having a hub keyed to the driven shaft 6|, provided with any suitable anti-frictional bearings 62, 63, mounted in a split housing unit 64, 65, the housing parts being bolted together by any suitable bolts 66.

The lower housing part includes a sleeve 61, pivoted on a shaft 68, mounted in split blocks69, which may be welded -to the plate |1, as shown in Fig. 6;. 19 is a bar secured by some of the bolts 66 to the bottom housing member 65,*at onev side thereof, as shown in Fig. 5. This bar is apertured as at 1| to permit the passage therethrough of a sleeve 12, through `the hollow of which extends a bolt 13.

Clamped to the sleeve 12 is a split block 14, which may be secured by the bolt 15. The block is grooved to receive the iiattened pin 16, which may be rotated by any suitable handle 11 at its terminal knob or ball 16. 19 indicate centering washers at each side of the flattened pin portion 16. When the parts are in the position of Fig. '1, the downward movement of the bar 10 is limited by the roller 51, restraining movement about the shaft 68. The bar 10 slightly clears the flattened portion of the pin 16. However, when the handle 11 is moved in the dotted line direction of Fig. 6, therounded portion of the pin 16 engages and slightly lifts the bar 19 and moves the drum 59 out of driving contact with the roller 51.

The center bolt 13 is held in the position shown in Fig. '7, with the washer abutting against the top-of the sleeve 12, as by any suitable nuts 82. The split housing G4, 65 may be raised by moving the handle 11 from the full line to the dotted line position of Fig. 6, which results in rotating the pin 16. In the raised position the rounded portion engages the bottom of the bar 11i-and lifts it. It will be understood that, when the parts are in the full line position of Fig. 6, the roller 51 is in driving contact with the inner'face of the drum flange 59, and the below described drill is then driven by the motor. When the handle is moved out to the dotted line position of Fig. 6, the transmission housing is slightly rotated about thev shaft 69, and the result is to free the roller 51 from driving contact with theange 59, thus interrupting the drive. The friction is governed by the spring 89, which is properly-set as by the sleeve 12.

Mounted on or forming part of the shaft 6| is the pinion 85, which is i-n mesh with the gear 86011 the shaft 31, mounted in any suitable bearings 88 in the split housing 64, 65. The shaft 81 carries any suitable sprocket or sprockets 89, located exteriorly of the housing 64, G5', about which pass sprocket chains 9U, which extend about sprockets 9| mounted on or formed integrally with the sleeve 92, rotatable'in the sleeve 23. 93 indicate any suitableballbearings, for one end of the rotated sleeve 32, and 94 indicate any suitable bearing means for the opposite end 4of said sleeve. l

The sleeve r chuck spindle 92 has a pair of tapered seats 95,'each one of which is semi-circular in cross section at the outer end, converging to form a true circle, or its approximation, at the inner end. Separating these ltapered seats o are lateral enlargements which may be generally arcuate in cross section, shown for example at 95 in Figs. 9 and 10i. l

91 indicates a flat drill bit which is held between the chuck halves 90, the outer faces of which conform to the faces of the tapered seats 95 of the spindle t2. The chuck halves 98 are grooved as at 00 to hold the the drill 5l in proper alignment. They are also provided with a plurality of aligning holes |00, which may receive a limit pin lill, which serves to position the inner end of the bit 0l. t will be understood that as the bit wears down the pin lill may be advanced successively forwardly along the sequence of aligned holes |00. The chuck assembly is -frictionally held in place by the seating of the chuck halves against the opposed tapered faces of the spindle 92.

As a ready means 'for kicking out the chuck we provided kickout pin |03, having an enlarged head |05, within the cavity of the spindleA 52, to limit its outward movement, and an exterior spring ring |05 to limit its inward penetration.

. tween the arms |25.

wardly moved away from the rail in order to clear the bit from thetop rail flange. Then the frame is lifted, and the arms rotate downwardly to the dotted line position, as shown in Fig. 2 at which time the pawls |21 engage the abutments |28, which are shown as extendingv be- The pawls are pivoted between the members I0, H, as at |29. |30 are supporting pins for holding the pawls in proper alignment to engage the members |28.

As the frame is lifted, for example by means of the rods or handles |22, the outwardly extending members engage the tops of the rail. After the frame has been lifted far enough so that the bit clears the top flange of the rail, then the frame may be moved laterally back into position over the rail, with the rollers |25 engaging the ft will be understood that when the drill is in use the pin |52 isnot functioning, but a tap or push is sufficient to release the chuck by unseating the chuck halves 98, to permit the removal of the chuck for replacement or adjustment of the bit Si. The side enlargements 96 permit the eniployment of bits of a width greater than the diameter of the chuck halves, and of course a smaller bit can also be employed if desired.

In order to feed the drill we provide a dog l0, effective to engage a rail web on a side opposite the drill. 1t may be of any suitable form, and is provided with any suitable aperture I to permit the passage of the bit therethrough. The dog H0 is mounted on or forms part of the carriage H2, which has laterally extending pins IIB, on which are mounted rollers I4, which ride within the channels 8. We illustrate two pairs of rollers l lli, at each end of the carriage l2, as shown for example in Fig. 3. The carriage H2 is screw threaded upon the worm l5, and may be rotated, for example, by the exterior crank H5, with the handle ployed for final adjustment and for feeding the drill. It will be understood that the ratchet is reversible, the details not forming of themselves part of the present invention. The worm shaft as a whole is mounted in any suitable ball bearings ||9 within the sleeve 24.

In order to raise the frame from the track and permit it to roll along the track, we provide, as shown in Figs. 1, 2 and 3, a pair of arms |20, the upper ends of which may be secured to sleeves |2|, rotatable on rods |22, passing between the side frame members 5, 5. Atvthe lower ends the arms |20 are `provided with blocks |23, which carry shafts |24, upon which are mounted track engaging rollers |25. Welded to these blocks are transversely extending bars |25, which extend outwardly, as shown for example in Fig. 4. During Ythe operation of the device these arms |26 may rest upon the rail tops, as by that time the supporting arms perform no function. When it is desired to raise the frame, the frame is for- Any suitable ratchet I8 may be em,

rail top. AThe device is then ready to be wheeled along the track. The extensions 25 are also effective to prevent the arms |20 from dropping down during the drilling operation,` when the frame as a whole is bodily moved toward or away from the work, as the bit is advanced or re tracted. For the same reason the bars 38are of substantial length to permit a* substantial transverse movement of the frame during the drilling operation as the frame and chuck are moved in unison as the drill is fed ltoward or away from the work.

Referring to the form of Fig.A 13, we virtually combine the functions of the arms 31 and |20 in the arms |40, welded intermediate their ends to sleeves |40a, which are pivoted to the frame as at |4I, and provided at their upper ends with pivoted nuts |42, in mesh with the actuating shaft |43, with its reverse threads |44, |45. The shaft |43 is supported and held against endwise movement by a slotted bracket |46. secured in any suitable manner to the frame structure, and-abutments |41 are provided on the shaft |43 at each side of the bracket |45. The shaft may be rotated, for example, by means of a crank |49, shown in dotted lines, or a ratchet lever |48. The arms |40 carry at their lower ends structures similar to those illustrated in Figs. 1 and 2, including rollers |25a. The rollers |25a are of sufcient length to permit transverse sliding movement on the rail.

Referring to the form of Figs. 14 to 17, we illustrate the form of our drill, which may be employed for use with other track working equipment separately mounted or supported on the rails, or adjacent the rails, such as,A for example, a track wrench, the details of which do not of themselves form part of the present invention. Therefore, in the variant form or attachment, a power plant is omitted from the drill proper, and the drill is directly driven by the rotation of the operating spindle of the track wrench.

Referring to the drawings, we illustrate a frame, consisting of two opposedI channels |50, |5|, which may be connected and-spaced as by an inverted angle iron |52. These channels perform'the same function as the channels 8 and the angle iron 9` of Fig. 3. They are further connected at their forward end by a plate |53, which carries at -its lower end a spindle bearing |54, and in which rotates a drill spindle |55, the details of which are generally the same as the spindle 92 of Fig. 3. However, the spindle |55 has a square or non-circular aperture atits outerv Ehe .details of thechuckstructurearethesame :andrneed not be vvseparately rdescribed.

'The :plate L53 has :sidewebs .|15-1, which .are secured .to :the alower ilanges ofthe channels '1:50, -|i5|. .The "parts .are preferably welded together.

of Fig. i3, is provided with a bearing .portion |58,

rotating in a bearing sleeve .159, mounted onthe plate |53. The portion |58 has an enlargement, as at |60, opposed to 'the bearings IBI, on .an outwardextensionof the sleeve '159. |62 .is aclosure plate, vthrough which-extends an end .portion |63 of the wormywhich has asquared portion '|64 "to receive any suitable :ratchet member |65, `whereby the worm maybe rotated in either direction. The details of the ratchet 'do not of themselves form part of the present invention.

IA lifting handle |66 'may be welded or -otherwise secured to the top of :the device, as to 1in- .verted angle |52. A dog ||a, substantially the 'same as the dog ||0 of Fig. .3, yis mounted von .or forms part of a carriage '|.|2a, vhaving -rollers ||3a, which ride in the kchannels 15.0, 15|. The

end of the Worm opposite to the ratchet .|65 is provided with a tubular extension |61, which eX- f;

tends outwardly beyond the ends-of the channels .|50, .and .is received in a supporting bracket or bearing |68, a portion of which, |69, may be welded to the inverted channel |52. .A handle is connected bya crank |f| Lto the outer end yoflthe worm extension |61.

The vframe above `describedmay be mounted for transverse sliding movement on 'the top of the `rail 2, as by any suitable .abutments |12, which are mounted at the lower ends of pins |13, which lpass through lugs `|14 secured to .the youter faces Vof :the :channels |50, v|5|. 'The .pins are adjustably secured inthe lugs |14 .by studs |15, which `are grooved as at |16 to engage a ,portion of the pins, |13. The .studs are screw threaded to receivewing nuts -|'11, as shown in Figs. 15 and ,17.

-dlesor wing nuts |88 secured .to the :upper ends g of .the'screws 04 facilitate rotation lof said screws iforadjustment, which, when 'properly adjusted, are lockedin position by winged lock nuts |80.

`In order to rotate the drill we may employ, Yfor example, a track wrench of the general type .shownin :Patent No. 1,978,513, .issued OctoberBO, 1934, to Henry H. Talboys. As the details o'f the wrench .do .not form part .of .the vpresent invention, it .is `generally indicated as A in Fig. 16.

.It 4will berealized, however, that at the end of the wrench isa driven spindle '200, which 'may be driven from the track wrench power plant 20 I, as by the chain 202. `The spindle 200 is shown as 'terminating in a. square shaft 203, which lpenetrates a square aperture in an adaptor '204, which is rotatably mounted at the end 4of the track Wrench arm in any suitable manner. It, in zturn,

`adaptedfor penetration into the 'square aperture |56 of the drill sleeve 155. It `will be understood,

marasma "therefore, that'when thedrillis properlyzacljusted in relationfto'thesrail, =with 'thedog 0a in .proper position, the rotation of the shaft 203 and .the adaptor 204 .drives the v.drill and rotates the .bit .91. The tapering of the .squared head 205 ofthe adaptor permits variation or tilting between the axis of rotation of the drill bit .91, without any binding or disturbance.

It will be realized that, whereas we .have de- .scribed and illustrated a practical and operative device, nevertheless many changes may Abe made in the size, shape, number and disposition of parts without departing from the spirit of-our invention. We therefore wish our descriptionanddrawings to be taken as in a broad sense illustrative or diagrammatic, rather than as limiting us to our precise showing.

We claim:

l. In a transmission for rotary tools, a frame, .and means for supporting it on a track, motor means on said frame, including a drive shaft and .a drive roller thereon, and a transmission lunit bodily movable as a whole in relation to said irame, said transmission unit including a hollow .generally cylindrical drum having a flange adapted, when said transmission unit is vin one position, to .engage said drive roller, yielding means for urging vsaid unit into roller contacting position, and means for :moving it out of roller contacting position, including an abutment member on the transmission unit, a supporting member `on .theframe a rotatable lifting memaber interposed between the two, and means for rotating it, the lifting .member having .a portion of maximum .thickness adapted to receive `and support the abutment member, with the drum out of ldriven contact with the roller, and a portion of minimum thickness adapted to receive Vand support the abutment, with the drum in contact with the roller.

2. In a rail drill, a frame and means for supporting it, a motor means on said frame including .a drive shaft, with .a drive roller thereon, a transmission assembly mounted rfor movement as a .unit in relation to said :frame and including a drill spindle, a driven shaft, `a driving connec- Ytion between .said driven .shaft and drill spindle,

a driving drum,.and a drivingconnection between said driving drum and driven shaft, said driving drum having a flange adapted to engage said roller, means for yieldingly urging said unit as .a whole .into a predetermined driving vposition in which the drum iiange engages said roller, and means for readily moving said transmission .unit as a Whole to a position in which the drum flange is out of driving lcontact with said roller.

.3. In a rail drill, a frame, :and means for supporting it, a motor .means on said frame including Aa'drive shaft and a drive member thereon, a transmission assembly mounted for movement as a unit in relation -to vsaid frame and .including a drill spindle, .a -driven member, 4and a driving connection between .said driven member andsaid drill spindle, means .for yielding'ly .urging said unit as a whole yinto a predetermined driving position in which the driven member .is .in driven relationship with the .drive `member of the motor, and means for readily moving said transmission unit as a whole toa position in which the driven memfber .is out of driving connection with .said drive member.

4. In .a rail drill, a frame, .and means for supporting it, a motor means on said frame includingr a drive .shaft anda drive member thereon,

ya transmission assembly mounted for movement as a unit in relation to said frame, a driven-member, and a driving connection between said driven member and said drill spindle, means for yieldingly urging said unit as a whole into a predetermined driving position in which the driven :f

member is in driven relationship with the drive member of the motor, and means for readily moving said transmission unit as a whole to a position in which the driven member is out of driving connection with said drive member, including an abutment member on said assembly, a sup-porting member on the frame, a rotatable lifting member interposed between the two, and means for rotating it, the lifting member having a .portion of yminimum thickness adapted to re-.

said frame, each said lever having a transversely extending and generally horizontal portion adapted to engage the top of the rail in slidable relationship, an actuating worm rotatably mounted on said frame and fixed against longitudinal movement thereon, said worm lying in general parallelism with the rail and having at each end worm threads of opposite pitch, and a nut member associated with each said lever and in screw threaded relationship with one of said threaded portions, and means for rotating said worm and for thereby unitarily moving said levers simultaneously toward or away from each other and for thereby raising or lowering said frame.

6. In a rail drill, a frame, means forsupporting it on a rail in operating position, and additional means for supporting it on the rail in raised position, including a pair of levers oppositely and outwardly extending from transverse pivots longitudinally spaced along said frame, each said'lever having at the outer end thereof a rail engaging roller, and means `for holding said levers in frame raising position, including pawls interposed between said levers and said frame.

7. In a rail drill, a frame, means for supporting it on a rail in operating position, and additional means'for supporting it on the rail in raised position, including a pair of levers oppositely and outwardly extending from transverse pivots longitudinally spaced along said frame, each said lever having at the outer end thereof a rail engaging roller, a transversely extending abutment member of greater length than the roller and liying in parallelism with the axis of the roller, adapted for slidable engagement with the topof the rail when the roller is out of supporting engagement with the rail.

8. In a rail drill, a frame and means for supporting it on a rail, a drillv spindle rotatably mounted on saidframe and held against longitudinal movement along its axis in relation t said frame, a drill bit in said spindle, means for rotating said spindle and bit, a rail engaging dog mounted on said frame and including a portion adapted to engage the side of the rail web opposite to the spindle, and means for bodily moving the frame and spindle in relation to said dog and for thereby feeding the drill bit toward and through the rail, said means including a worm rotatably mounted on said frame and held against longitudinal movement in relation thereto along its axis, and means for rotating said worm, and a carrier for said dog, including a portion in mesh with said worm.

9. In a rail drill, a frame and means for supporting it on a rail,- a drill spindle rotatably mounted on said frame and held against longitudinal movement along its axis in relation to said frame, a drill bit in said spindle, means for rotating said spindle and bit, a rail engaging dog mounted on said frame and including a portion adapted to engage the side of the` rail web opposite to the spindle, and means for bodily moving the frame and spindle in relation to said dog and for thereby feeding the drill bit toward and through the rail, said means including a worm ,rotatably mounted on said frame and held against longitudinal movement in relation thereto along its axis, means for rotating said worm, a carrier for said dog, including a portion in mesh with said worin, and guiding means for said carrier, includinga pair of/ laterally spaced tracks and rollers at opposite sides of said carrier in guiding rela- -tionship with said tracks.

l0. In a rail drill, a frame and means for slidably and adjustably supporting it on a rail, including a plurality of supporting elements mounted for movement on said frame, and means for raising and lowering them in relation to said frame, each such support including an abutment member slidable on the top of the rail, a drill spindle rotatably mounted on said frame and means for holding it against longitudinal movement along its axis in relation to said frame, a drill bit in. `said spindle, means for rotating said spindle and bit, a rail .engaging dog mounted on said frame and including a portion adapted to engage the side of the rail web opposite the spindle, and means for bodily moving the frame and spindle in relation to said dog, with said abutments sliding transversely across the rail, and for thereby feeding the drill bit toward and through the rail.

ll. In a rail drill, a frame and means for slidably supporting it on a rail lfor transverse sliding movement across said rail, a drill spindle rotatably mounted on said frame and held against longitudinal movement along its axis in relation to said fra-me, a drill bit in said spindle and means for rotating spindle and bit, guide means on said frame, a carrier member longitudinally movable along said guide means, a dog on said guide means adapted for engagement with the side of the rail web opposite the spindle, and means for bodily moving the frame and spindle in relation to said dog, and for thereby feeding the drill bit toward and through the rail.

12. In a rail drill, a frame and means for slidably supporting it on a rail for transverse sliding movement across said rail, a drill spindle rotatably mounted on said frame and held against longitudinal movement along its axis in relation to said frame, a drill bit in said spindle and means for rotating spindle and bit, guide means onsaid frame, including a pair of parallel tracks, a carrier member longitudinally movable along said tracks and having a plurality of rollers at each side thereof engaging said tracks, a dog on said guide means adapted for engagement with the side of the rail web opposite the spindle, and means for bodily moving frame and spindle in relation to said dog, and for thereby feeding the drill bit toward and through the rail.

13. In a rail drill, a. frame and means for slidably supporting it on a rail for transverse sliding movement across said rail, a drill spindle ro- 'tatably lmounted on saidframe andheldag-ainst longitudinal movement along its axis in relation to'said-'frama a drill` bit in said spindle Iand means for rotating spindle and bit, guide means'on said frame, including a'pairzof paralleltracks, a carrier member`longitudinallymovable along said vtracks and having alplurality of rollers at each side thereof engaging said tracks, a dog on said guide 'means adapted for engagement with the yside of the rail web lopposite the spindle, and

means for bodily moving frame and spindle in relation to said dog, and for thereby feeding the 'drill bit toward and throughthefrail, including a worm `rotatably mounted on the"frame and held against longitudinal movement in rela-tion to said frame along its axis, said carrier member being in screw threaded relationship with said dog.

14. In a rail drill, a frame and means for slidably'supporting it on a rail for transverse sliding movement across said rail, a drill spindle rotatably mounted on said frame and held against 'longitudinal movement along its axis in relation to said frame, a drill bit in said `spindle and means for rotating spindle and bit, guide means on said frame, including a pair of parallel tracks, a carrier member longitudinally movable along said tracks and having a plurality of rollers at leach side-thereof engaging said tracks, a dog onl said 15.In a raildrill, a frame and means for supporti-ng it on a rail, motor 'means on said'frame, a drill spindle rotatably mounted onsaidfralne and held against longitudinal movement in relation to` said frame,v a driving connection lbetween said spindle and said motorrneans, and supporting means extending from said frame to the opposite rail of the track, said supporting means including a bar in telescopic relationship with the frame and having a rail contacting abutment at its outer end, and selective'mounting means for said bar on'sald frame, adapted to supportl said bar selectively, extending outwardly from said frame at opposite sides of the frame.

16. In a rail drill, a frame and means for supporting it on a rail, motor means on said frame, a drill spindle rotatably mounted on vsaid frame and held against longitudinal movement in relation to said frame, a driving connection between said spindle and said motor means, Iand sup- 4 porting means extending from'sai'd frame :to the opposite rail of the track, said supporting means including a bar in telescopic relationship With the'frame and having a rail contacting abutment at its outer end, `and selective mounting means for said baron said frame, vadapted to'support said bar selectively, extending outwardly from said frame at opposite sides-oftheframa'including sockets on said frame having bar receiving openings at opposite sides thereof.

1'7. Ina rail drill, a frame-and means for-supporting'it Von a rail for transverse movement across said rail, a idrill spindle mounted on said frame andlixed against longitudinal movement in relation to saidframe, a dog movably mounted on said frame Yandvadapted to-be opposed to the :gera-524 side of the rail web vopposite said spindle, 'and means 'for 4moving said dog in relation to said 'frame and for thereby'bodily moving said 'frame vmounted on said frame land fixed against longitudinal movement in relation to said frame, a dog Inova-bly mounted on said frame and adapted to be opposed to the side of the rail web opposite lsaid spindle, andmeans for moving said dog in relation to said frame and forI 'thereby bodilyfmoving said frame and spindle across said rail and thereby feeding the drill toward the face of the rail web opposite the dog,rand a connector member interpenetrating with lsaidy spindle, adapted `for driving connection with a power plant separate from said frame.

19. AIn a rail drill, a frame andrmeans for supporting it on a rail for transverse movement across `said rail, a drill spindle mounted on said frame and 'fixed against longitudinal movement in relation to said frame, a dog movably mounted on said frame and adapted to beopposed to the side of the rail webopposite said spindle, and means for moving-said dog in relation to said frame yand for thereby' 'bodily moving y'said `frame and spindle across said rail and thereby feeding the drill toward the face of the rail web opposite the dog, and a connector member'interpenetrating With `said spindle, adapted for driving connection withapower plant separate from said frame, saidfconnector lmember being held against rotation infrelation to said spindle but being tiltable in relation thereto.

20. In a rail drill, a frame and means for supporting 'it'.on -a rail for transverse movement acrosssaid-rail, a drill spindle'mounted on said framefandfxed against longitudinal movement in relation to said frame, a dog movablymounted on said 'frame and adapted yto'be'opposed to the side of the rail 'web oppositesaid spindle, and means for moving said dog in relation to said frame and for thereby' bodily moving said frame and spindle across the rail vand thereby feeding the drill toward the'face of the rail web opposite the dog, and a connector member rotatable in unison with said spindle, said spindle and connector =member having interpenetrating parts adapted to-permit said connector member to tilt in relation to the spindle.

21. `In a rail drill, a frame, means for supportingiit on a rail in operating position, and additional means for supporting' it on'therail in raised position. including a pair oflevers `oppositely and outwardly extending fromtransverse pivots longitudinally spaced along said frame, each said lever having-'at'the outerend thereoffa rail engaging roller, means for holding said levers in frame raisingposition,'and-additional rail engaging means at the outer en'ds of said levers'having a transverse vextension -greaterthan the length `of 'said railengagingrollers.

22,'In a rail drill, -a frame,means forsupporting'it on a rail in operating position, and addi tional means for supporting it on the rail in raised position;including a pair of levers oppositely vand outwardly extendingfrom transverse pivots longitudinally spaced along said frame, each said lever having at the outer end thereof a rail engaging rollen* means for holding said levers in frame raising positionl and additional rail engaging l means at the outer ends of said levers having a transverse extension greater than the length of said rail engaging rollers, said additional means being positioned to engage said rail when the rollers are out of supporting engagement with said rail.

23. In a rail drill,a frame and means for slidably supporting it on a rail for transverse sliding movement across said rail, a drill spindle rotatably mounted on said frame and held against longitudinal movement along its axis in relation to saidframe, a drill bit in said spindle and means toward and through the rail, said dog including a Web engaging bifurcation, the space between said bifurcation being aligned with the axis of rotation of the spindle. i

HENRY H. TALBOYS. HELMER E. ERICKSON. 

